Herds of sheep stroll and graze on the grassland in the Mt.Qomolangma Nature Reserve, photo from China Tibet Online.

The Changtang Nature Reserve of Ngari Prefecture in the southwest China's Tibet Autonomous Region is a paradise for wild animals, photo from China Tibet Online.

According to the regional Environmental Protection Bureau, one-third of the land in Tibet Autonomous Region has been protected as nature reserves so far, contributing remarkably to the biodiversity preservation undertaking in the world.

So far, there are 47 nature reserves in Tibet with an area of 413,700 square kilometers, taking up 34.74 percent of the region's totalarea, ranking first in China.